Catheter
AssigneeTerumo Kabushiki Kaisha
InventorsKenichi Kumoyama, Junichi Kobayashi
Life of this patent
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Abstract
A catheter includes a distal shaft, and a proximal shaft having its distal portion inserted and fixed in the distal shaft. The distal shaft includes a guide wire lumen, and a distal shaft lumen, with the distal shaft lumen communicating with a proximal shaft lumen. The proximal shaft includes a main body portion, a distal portion smaller in size than the main body portion and entering into the distal shaft lumen, and a proximal shaft inclined portion located between the main body portion and the distal portion. The distal shaft lumen has a lumen change portion reduced in lumen cross-section toward the distal side. The proximal shaft inclined portion and the lumen change portion abut on each other.
Claims25
A catheter comprising:
- a distal shaft;
- a proximal shaft having a distal portion inserted and fixed in the distal shaft;
- the distal shaft comprising a guide wire lumen and a distal shaft lumen, the guide wire lumen extending in a longitudinal direction of the distal shaft and communicating with a guide wire insertion port at a proximal portion of the distal shaft, the distal shaft lumen extending in the longitudinal direction of the distal shaft and communicating with a proximal shaft lumen formed inside the proximal shaft;
- the proximal shaft comprising a main body portion, a distal portion smaller in outer dimension than the main body portion and entering into the distal shaft lumen, and a proximal shaft inclined portion located between the main body portion and the distal portion;
- the distal shaft lumen possessing a lumen change portion that is reduced in lumen cross-section in a direction toward the distal side of the distal shaft lumen;
- and
- the proximal shaft inclined portion and the lumen change portion abutting on each other so that a pushing force applied to the main body portion of the proximal shaft is transmitted to the distal shaft through the abutting proximal shaft inclined portion and lumen change portion.
A catheter comprising:
- a distal shaft comprising a guide wire lumen and a distal shaft lumen which are separately disposed, the guide wire lumen extending longitudinally along at least a portion of the distal shaft and terminating at a guide wire insertion port at a proximal end of the guide wire lumen, the distal shaft lumen extending longitudinally along at least a portion of the distal shaft;
- a proximal shaft fixed to the distal shaft, the proximal shaft comprising a proximal shaft lumen communicating with the distal shaft lumen;
- the proximal shaft comprising a main body portion, a distal portion and a proximal shaft inclined portion located axially between the main body portion and the distal portion, the distal portion of the proximal shaft possessing an outer dimension that is reduced relative to the main body portion, the distal portion of the proximal shaft being positioned inside the distal shaft lumen, the proximal shaft inclined portion possessing an inclined surface that is inclined relative to a longitudinal axis of the proximal shaft;
- the distal shaft lumen comprising a lumen change portion possessing an inclined surface;
- and
- the inclined surface of the proximal shaft inclined portion and the inclined surface of the lumen change portion axially overlapping and abutting one another so that a pushing force applied to the main body portion of the proximal shaft is transmitted to the distal shaft through the abutting inclined surfaces of the proximal shaft inclined portion and the lumen change portion.
Dependencies are inferred from the claim text.